tires are massively important for safety! Any tire will be fine for cruising around under normal circumstances. In the rain or snow, however, you'll need a good tire to get grip for acceleration, turning, and braking. Under emergency conditions (emergency lane change, swerving to dodge wildlife, braking for an accident in front of you, etc.) you want the most grip you can possibly get. Airbags and seatbelts can help you survive a crash, but good tires can prevent that crash in the first place.